rmgh, I think it's okay to have two sides to yourself, or even more. People are not one-dimensional and it's normal to recognize that certain behaviors and ways of being are preferable in some situations over others. And if in the course of behaving differently, you discover that you can function equally well in either realm, and experience a bit of a sense of not knowing who the "real you" is, I think that is just you experimenting and adapting, which is what humans do.
Maybe you will reconcile the two "selves" and maybe you won't, maybe you will abandon one for the other, or maybe you will blend the two, or maybe you will always have a slightly different "persona" depending on where you are or who you are with, or maybe you will become something else completely different from either one. People are not meant to be static, and change is common and not necessarily bad.
I think that sometimes we fixate on the idea that we are "X.Y,Z" and ONLY "X,Y,Z" and we perceive any change or variance as a denial of self or some kind of problem (I used to!), but I also think that as long as whatever you are doing works for you, and you are happy, that is the only thing that matters.
If you feel unhappy, then that is something to take a look at and work on specifically - like, if you WANT people to know you like buses, yet feel like you are somehow hiding it from them, then try to share just a little of your interest with people who were previously unaware of it. Or, if you feel your obsession with buses is stopping you from functioning, then try to cut down on the time you spend on them, by focusing on something else. Most importantly, don't attach value to either way of being, like one is better than the other. You be the way you WANT to be, in as many incarnations as expresses all of your sides.

I think you're right, this is the best way to be. Sometimes, though, I feel like I'm not sure if I am either of them. I suppose it all takes time.